Agrostis oregonensis

Agrostis oregonensis is a species of grass known by the common name Oregon bent grass. It is native to western North America from Alaska to California to Wyoming, where it grows in several habitat types.

Description
It is a perennial bunchgrass growing in 75 centimeters tall. The leaves are flat and up to 30 centimeters long. The inflorescence is a wide open array of wispy branches bearing clusters of spikelets each a few millimeters long.